| Acronym | Meaning |
| OCTA | Oxidizing Capacity Of The Tropospheric Atmosphere |
| DQMC | Diffusion Quantum Monte Carlo (method In Atom And Mol. Calcns.) |
| CP | Coupled Pair (many-electron Theory) |
| PMF | Proton Motive Force |
| GALEX | Galaxy Evolution Explorer |
| OSWER BBS | OSWER Electronic Bulletin Board System (see CLU-IN) |
| DXRL | Deep X-ray Lithography |
| MLE | Molecular Layer Epitaxy |
| DIIS | Direct Inversion In The Iterative Space |
| ACSTM | Alternating Current Scanning Tunneling Microscopy |